Monodromy-data parameterization of spaces of local solutions of integrable reductions of Einstein's field equations

Abstract

For the fields depending on two of the four space-time coordinates only, the spaces of local solutions of various integrable reductions of Einstein's field equations are shown to be the subspaces of the spaces of local solutions of the ``null-curvature'' equations constricted by a requirement of a universal (i.e. solution independent) structures of the canonical Jordan forms of the unknown matrix variables. These spaces of solutions of the ``null-curvature'' equations can be parametrized by a finite sets of free functional parameters -- arbitrary holomorphic (in some local domains) functions of the spectral parameter which can be interpreted as the monodromy data on the spectral plane of the fundamental solutions of associated linear systems. Direct and inverse problems of such mapping (``monodromy transform''), i.e. the problem of finding of the monodromy data for any local solution of the ``null-curvature'' equations with given canonical forms, as well as the existence and uniqueness of such solution for arbitrarily chosen monodromy data are shown to be solvable unambiguously. The linear singular integral equations solving the inverse problems and the explicit forms of the monodromy data corresponding to the spaces of solutions of the symmetry reduced Einstein's field equations are derived.

arXiv commentLaTeX, 33 pages, 1 figure. Typos, language and reference corrections

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• Integrable Models of 1+1 Dimensional Dilaton Gravity Coupled to Scalar Matter
• Dimensional Reduction of Gravity and Relation between Static States, Cosmologies and Waves
• Integrable structures and the quantization of free null initial data for gravity
• Thirty years of studies of integrable reductions of Einstein's field equations
• Monodromy transform and the integral equation method for solving the string gravity and supergravity equations in four and higher dimensions
• Comment on F.J.Ernst, V.S.Manko and E.Ruiz "On interrelations between Sibgatullin's and Alekseev's approaches to the construction of exact solutions of the Einstein-Maxwell equations" (J.Phys.:Conf.Ser.229(2010)012050; arXiv:1006.5118)